Yep the 9mm runs at higher pressure, but the brass is thicker too. If you run std. pressure loads, 10x is easy. I shoot a 124gr LTC cast from clip on ww (BHN 10-12) it runs fine all the way to 1200fps w/ little to no leading. A good lube helps, WHitleLabel Carnuba is tops. Unique & lead bullets are like PB&J. If you don't like Unique (5gr) then WSF (5.1gr) or WST (4.8gr). Clean burning & very accurate.